FlyinJohnnyL
You need more workers....
The effect obsoletes yes, but if you built the monument manually (as opposed to getting it via SH) it will remain and produce ... hm, what? culture? I'm pretty sure the CHA happiness obsoletes at Astro as well ...
And the answer would be that yes, the game keeps track of which Monuments were built manually and which spawned from SH (for example, the SH monuments won't double their culture after 1000 years).
Yeah this is what I was looking for. So if you're playing someone like Zara and shooting for a culture victory, you're probably better off building the Monuments than building SH.